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You are here: Home / Explanatory Dictionary / Calcium

Calcium

one of the principal elements making up the earths crust, the compounds of which make the water hard. The presence of calcium in water is a factor contributing to the formation of scale and insoluble soap curds which are a means of clearly identifying hard water.

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Definitioner

Soap
one of a class of compounds which possesses cleaning properties, Sodium and potassium are soluble and useful.
Hard Water
water with a total hardness of one grain per gallon or more, as calcium carbonate equivalent.
Calcium
one of the principal elements making up the earths crust, the compounds of which make the water hard. The presence of calcium in water is a factor contributing to the formation of scale and insoluble soap curds which are a means of clearly identifying hard water.